Cupola-furnace



(No Model.)

J. H. WHITING.

GUPOLA FURNACE. No. 324,623. Patented Aug. 18, 1885 14? 207."! W/wh' NITED STATES J. HILL WHITING, OF DETROIT, llIIGHIGAN.

CUPOLA-FU-RNACE.

SPECIFICATION forming part of Letters Patent No. 324,623, dated August 18, 18185.

(No model.)

This invention relates to a new and useful improvement in cupolafurnaces, of which the following is a specification.

My invention consists in the peculiar and novel construction and arrangement of the tuyeres, which, instead of directing the blast in a concentrated form into the furnace, as in the present arrangement, diffuse it over the entire area of the cross-section of the cupolafurnace, all as hereinafter described.

In the accompanying drawings, Figure l is a vertical central section of a cupola-furnace provided with my improved tuyercs. Fig. 2 is a horizontal section 011 line :0 m.

A represents an ordinary cylindrical cupola-furnace, the base of which is surrounded by a jacket, 13, usually formed of cast-iron plates. This jacket forms an airchamber, 0, into which the blast from the blower is conducted through a suitable pipe, D, and which serves as a reservoir from which the blast is distributed into the tuyeres.

F are the usual series of tuyeres, occupying the usual positions; but in size and shape they are different from the ordinary form, and are constructed as follows: The inletopening a of each tuyere is of the usual area, but instead of contracting more or less toward the dis charge-opening b, as in the usual form, the tuyeres are made flaring, as shown, so that their side walls become more or less tangential to the inner circle of the cupola. In vertical section these tuyeres are also more or less of a flaring shape,butnot quite so much so asin horizontal section. The inner ends, 22, of the tuyeres are shaped circularly, so as to be flush with the inner face of the wall of the cupola.

I use a sufficient number of such tuyeres to bring the whole, or nearly the whole, area of the crosssection at the discharge end of the tuyeres under the direct action of the blast from the tuyeres, so that no dead-air spaces of any amount are left between the tuyeres.

With my diffusing-tuyeres more air is properly consumed in a given time, while the melting process takes place more evenly over the whole area of the cross-section of the cupola.

In practice I have found that where it is an object to get iron of great fluidity that is rich in carbon my diffusing tuyeres accomplish a much better result than the tuyere in ordinary use, which, on account of their form, are liable to concentrate the blast too much in the center of the cupola and burn the iron, technically speaking-that is, deprive it of some of its carbon.

It is clear that the blast-reservoir assists the flaring tuyercs to produce a more diffused blast.

I am aware of the Patents Nos. 240,136 and 290,343, and make no claim to anything shown therein as forming part of my invention.

I deem it important that the mouth of each tuyere is opposite the rib which forms the dividing-line between two tuyeres upon the 0pposite side, whereby the injected streams are forced diagonally across each other to thoroughly mix the gases.

What I claim as my invention is In a cupola-furnace, the combination, with the furnace A and jacket B surrounding the same and forming an airchamber, G, of the rectangular tuyeres F, each enlarging from its inlet to its outlet, and arranged, as shown, With a small rib, a, between each two adjacent tuyeres, and the mouth of each tuyere opposite the rib between two other tuyeres, whereby the blast entering through said tuyeres is diffused over thewhole sectional area of the enpola, substantially as described.

J. HILL VVHITING.

\Vitnesses:

H. S. SPRAGUE, E. J. SoULLY. 

